Card-grinding machine



(No Model.) 4 Sheets-Sheet 1.-

S. A. PRESCOTT.

GARD GRINDING MACHINE. No. 399,694. Patented Mar. 19, 1889.

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4 Sheets-Sheet 2.

(No Model.)

v S. A..PRES-GOTT.

CARD GRINDING MACHINE.

Patented Mar. 19, 1889.

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(No'ModeL) S. A. PRESCOTT.

CARD GRINDING MACHINE.

Patented Mar. 19, 1889.

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(No Model.) 4 Sheets-Sheet 4. S. A. PRESCOTT.

CARD GRINDING MAGHINE. No. 399,694. Patented Mar. 19, 1889;

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ME TATE arnnr rricn.

SAMUEL A. PRESCOTT, OF WVILKINSONVILLE, MASSACHUSETTS.

CARD-GRINDlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 399,694, dated March 19, 18819. Application filed July 19, 1888- Serial No. 280,352. (No model.)

To all whmn it may concern:

Be it known that I, SAMUEL A. PRESCOTT, of \Vilkinsonville, in the county of \Vorccster and State of Massachusetts, have invented certain new and useful Improvements in Card- Grinding Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification, and in which Figure 1 represents a top or plan view of a cardgrinding machine embodying my improvements. Fig. 2 is an end view thereof, looking in the direction indicated by the arrow in Fig. 1. Fig. 3 is a longitudinal vertical section through the upper part of the machine, taken on line a Z), Fig. 1. Figs. 4 and 5 are detail views of a part of the machine, hereinafter more fully described. Fig. 6 shows a modified construction in plan view of my machine made applicable to a carding-machine for grinding the main cylinder and doffer thereof. Fig. 7 shows a side or end view of said modified machine and so much of a carding-machine as is necessary to illustrate the application of my said machine thereto. Fig. 8 is a longitudinal vertical section of the machine shown in Fig. 6, taken on line 0 c of said figure; and Fig. 9 is a section of a part of said machine, taken on line d, Fig. '7.

My invention consists of one or more grinders having substantially flat grinding-surfaces and mechanism combined therewith for imparting both lateral and longitudinal reciprocating movements thereto, as and for the purpose hereinafter more fully set forth.

In order that others may better understand the nature and purpose of my said invention, I will now proceed to describe it more in detail.

In the drawings, A represents the main frame of the machine.

B B are two workers of a carding-machine placed therein to be ground, and O O are the grinders previously referred to. The workers are fitted to turn in suitable bearings, B B, at each end, and are driven by a belt, 6, passed around their respective pulleys B B and around a pulley, D, on the main driving-shaft E. Said main shaft E is like wise fitted to turn in suitable bearings and is slide-frame.

provided with the usual tight and loose pulleys, F F, which may in practice be connected by an endless belt with any suitable and convenient driving mechanism, which, in this instance, isnot shown, as the same constitutes no part of my improvements.

The grinders O O are preferably hinged t the transverse rods f f of frame G, and said frame is fitted to slide at each end on the horizontal longitudinal parallel rods or bars H H, which are adjustably fastened to slideframe A. In this instance said rods are shown as secured to the upper ends of short vertical rods H H, fitted to slide up and down in rigid bearings H H and fastened after adjustment by the setscrews g.

The frame G has longitudinal reciprocating movements imparted to it upon its side supporting-rods, H H, aforesaid, by means of the eccentrics I I on the horizontal shaft J through the connecting-rods K K, hinged at their inner ends to the frame G and at their outer ends to said eccentrics. The shaft J is fitted to turn in the rigid bearings J J, and is driven by means of a belt, L, passed around asmall pulley, L, 011 the main shaft E and a large pulley, L on said shaft J. The supports of shaft J are secured to slide-frame A, and said frame is fitted to slide laterally in suitable guideways in the top of main frame A. It is operated by means of a cam, M, through a hinged lever, N, engaging at one end with said cam and at its opposite end with said The cam is in this instance made in the form of an irregularly-shaped disk arranged vertically and fastened or formed upon the hub of its driving-pulley O. Said pulley is fitted to turn on the bearing 0, secured to frame A, and is driven by a belt, P, passed around the same, and a pulley, Q, on the main driving-shaft E.

The grinders are preferably made, as shown in the drawings, of two side strips, 77, h, held apart by suitable holding-rods, t' i, and nuts 7," i, and covered on the bottom with canvas or similar flexible material, j, stretched from one strip to the other, said canvas in turn being coated on the under side with emery or other suitable grinding material.

The canvas may be kept taut by turning the holding-rods i 2' so as to widen the space between the strips, said rods being,provided with right and left hand threads, as shown in the drawings, for this purpose.

Although the above construction of the grinders is preferable, I do not limit myself or make any special claim thereto, the essential feature of my invention consisting of the means employed for supporting and imparting to said grinders the desired reciprocating motions, as previously described. By thus operating the same mechanically over the surface of the cylinders in both lateral and longitudinal directions it is found in practice that the teeth'of the cards are ground in a very even and perfect manner.

The machine hereinbefore described, it will be understood, is designed to be used independent of the carding-machine, and is for the purpose of grinding the cards on such cylinders of a carding-machine as may be readily removed therefrom and placed in said machine; but as the main cylinder and deffer of said carding-machine are not susceptible of being conveniently removed, it is preferable to grind the same while in position in said machine. To accomplish this result is the purpose of the modified machine shown in Figs. 6 to 9, inclusive, of the drawings, and which will now be described. Said machine is so constructed as to admit of its being placed over the carding-machine, so as to bring its grinders against the main cylinder and I doffer to grind the same without removal, as

above stated. The only essential difference in the working parts between one construction and the other is that in the modified machine the canr and its connections for imparting lateral reciprocating movements to the grinders are left off in said machine, and the same result effected by arranging the parallel side rods, H H, at an oblique angle, instead of in a straight longitudinal line with the machine, said arrangement of the rods causing the frame G and its grinders to be moved with reciproeating movements toward one side and then the other as the frame is moved longitudinally on said rods by its eccentrics, as previously described. The main supporting-frame A is in this instance also left off, and only such frame-work employed as is necessary to support the operating parts in position over the carding-machine. In fitting the machine to said carding-machine, all the cylinders which are in the way above the main cylinder R and doffer S are first removed. An attendant at each end then lifts said machine and drops the supporting-rods 79 l into the bearings of the fancy, and one of the upper workers coming in line therewith, the grinders, when the machine is thus fitted, resting upon the main cylinder and dofier, as is indicated in Fig. 7.

In order that the upper grinder coming above the main cylinder may be adjusted toward and from said cylinder, it may be fast ened to the frame G by means of the threaded rods m m and n, all. having set-screws 0,

which may be turned thereon to adjust the grinder either laterally or vertically to bring it in proper position to act upon said main cylinder. (See Figs. 6 and 8.)

The supporting-rod may also be adjusted in the frame so as to bring it in proper position to drop into the work erbearings 70', as previously stated, by slotting out the frame, as shown at if, and fastening an inclined plate, 2), on each end of the frame fitted in an inclined slot in each bearing q of said rod k, thereby admitting of the rod beingmoved forward or back, as required for the above purpose. After adjustment the parts are fasten ed in position by means of the set-screws 0", passed through the bearings q against the outer sides of the plates. (See Figs. 7 and 9.) Although I prefer and have adopted this construction in practice, I do not limit myself thereto, or to the manner of adj usting the upper grinder to the main cylinder.

It will be seen from the foregoing description that my invention is as applicable to one as to the other of the machines shown and described, and I therefore reserve the right to apply the same to either, and also to make such other modifications in the construction as circumstances may require, coming within the principle of said invention.

The advantage attendant upon such application to'practice, as will at once be apparent to those skilled in the art, is that the surface of the grinders, being flexible and having a continual reciprocating motion in both lateral and longitudinal directions, as previously described, adapt themselves to any unevenness in the cards, and consequently results in grindin g them in a perfect and expeditious manner.

In order that different sizes of cylinders may be applied to the machine made as first described, the bearings in which said cylinders rest are in practice preferably made removable and several bearings of different heights provided for said machine, corresponding to the various sizes of the cylinders designed to be operated upon. In this instance Ihave shown said bearings held in position by means of vertical pins 5, inserted into the bottoms of the bearings and extending down into frame A. If preferred, however, any other equivalent means may be employed for the same purpose.

In the modified machine I have shown the eccentrics l I on a separate shaft from that on which the driving-pulley L is secured, and power is transmitted from one shaft to the other by means of a pair of spur-gears, it, secured one on each shaft, respectively,instead of securing the ecccentrics and said pulley L both on one shaft, as previously described; but I make no special claim thereto.

hat I claim, and desire to secure by Letters Patent, is

1. In a card grinding machine,the grinders O 0, frame G, fitted. to slide longitudinally on suitable supports and upon which said grinders are mounted, and eccentrics I I, operatively connected with said frame G and the driving mechanism for imparting longitudinal reciprocating movements to the grinders, in combination with frame A, fitted to slide laterally in suitable supports and operated by a cam, M, operatively connected with said frame A and the driving mechanism for imparting lateral reciprocating movements to the grinders, substantially as shown and specified.

2. In a card-grinding machine, the grinders (l O, in combination with frame G, fitted to slide longitudinally on suitable supports, and upon which said grinders are mounted, said frame-supports, and the eccentrics I I, operatively connected with said frame G and the driving mechanism, whereby longitudinal reciprocating movements may be imparted to the grinders, substantially as shown and specified.

3. In a card-grinding machine, the combination of the supports upon which the grinder-frame G slides longitudinally, with the frame A, fitted to slide laterally in suitable supports, said frame-supports, and cam M, operatively connected with said frame A and the driving mechanism, whereby lateral reciprocating movements may be imparted to said grinder-frame supports, and from thence through the other connections described to the grinders, substantially as shown and specified.

at. In a card-grinding machine, the grinders C O, in combination with frame G, fitted to slide upon suitable supporting rods or bars, H H, arranged longitudinally at an angle to the machine, and upon which frame the grind ers are mounted, said rods or bars and their supports, and the eccentrics I I, operatively connected with said frame G and the operat ing mechanism, whereby both longitudinal and lateral reciprocating movements are imparted to the grinders, substantially as shown and specified.

SAMUEL A. PRESCOTT. Witnesses:

A. A. BARKER, W. B. NoURsE. 

